Separable fixture-joint.



A. D. RZER. SEPEABLE FIXTURE JONT. APPLICATION PILE JAN. 2, 1913.

Patint-@ Jun@ 36, 2 SHEETEVSEEET riga.-

A. D, RIZER,

I SEPARABLE FIXTURE JOINT.

APPLICATION FILED JAN. 21, 1913.

LQQQQD n Patented June 30, 1914 2 SHEETS-SHEET 2.

.mr-5- s.

ARTHUR D. RIZER, 0F ELG'IN, ILLINOIS.

SEPARABLE FIXTURE-JOINT.

Specification of Letters Patent. Application filed January 21, 1913.

Patented J 1111e'30, 1914. Serial No. 743,383.

To all lwhom it may concor/z Be it known that I, ARTHUR I9. RIZER, a citizen of the United States, residing at Elgin, in the county of Kane and State of Illinois, have invented new and useful Improvements in Separable Fixture-Joints, of which the following is a specification.

This invention is an improved separable electric fixture joint, the object of the invention being to provide au improved device of this character which is so constructed that the parts thereof may be secured together without the necessity of turning any of the part-s to such an extent as to twist the conducting wires, the invention consisting essentially of a base having an opening, in combination with a bushing having a head to pass through the opening, and provided with means to engage the inner side of the base when the bushing is partly turned, and a locking means to engage the bushing and bear against the outer side of the base to hold the bushing in place as hereinafter more fully described and claimed.

In the accompanying drawing-Figure l is an elevation of a separable electrolier insulating joint constructed in accordance with my invention. Fig. 2 is a vertical central sectional view of the same. Fig. 2% is a detail sectional view of the bushing. Fig. 3 is a plan of the same. Fig. 4 is a horilzontal sectional view of the same on the plane indicated by the line a-a of Fig. 2. Fig. 5 is a detail perspective view of the insulating member of the base. Fig. 6 is an elevation of a separable fixture joint constructed in accordance with my invention. Fig. 7 is a vertical central longitudinal sectional view of the same. Fig. 8 is a. vertical transverse sectional view of the saine. F ig. 9 is a detail perspective view of the base with the bushing removed.

Referring first to the form of my invention shown in Figs. 1 to 5, as embodied in a separable electrolier insulating joint, there is provided a base l which comprises a substantially semi-spherical or conical metallic member 2, which is preferably a casting, and an insulating member 3. The member 2 is provided on its upper side at its center with a cylindrical boss 4 which is tapped and threaded as at 5 to enable the same to be screwed to a gas outlet or a conduit stud so as to afiix the base in place. Said member 2 has openings 6 at suitable oints in its sides for the admission .of the conducting wires ynally threaded for engagement by the pipe of the electric fixture and, in practice, the

workman screws the bushing to the pipe of the fixture in the shop before affixing the base at the place of installation. The bushing is provided at its inner end with a head 1l of a size and shape adapting it to pass through the opening 8 and, hence, in the present instance, this head is rectangular in form to correspond with the shape of said opening. A lock nut 12 is arranged on the threaded exterior of the bushing. The conducting wires pass through the bushing. In order to connect the bushing with the electric fixture to the base, itis only necessary to first pass the head of the bushing through the opening 8, then partly turn the bushing and fixture so as to engage corners of the head with the recesses 9 of the member 3 of the base and then screw the lock nut l2 on the bushing and engage the same with the outer or under side of the insulating member 3 of the base and thereby cause the lock nut to -coact with the head of the bushing to firmly clamp therlatter in place. It will be understood that since it is only necessary to partly turn the bushing, in the present instance through forty-five degrees, in order to engage the head of the bushing with the locking recess 9, the conducting wires of the fixture are not twisted, and, moreover, the operation of connecting the bushing to the base is rendered extremely simple and may be almost instantly done, the only tool that is required being a wrench or spanner to turn and set up the lock nut.

Referring to Figs. 6 to 9 of the drawing, in which I show my invention embodied in a separable4 fixture joint, the base 13 comprises a central portion 14 and pair of supporting legs 15 arranged opposite each other and each provided with an outstanding segmental fiange 16 to bear against the wall or against the base plate of an electric conduit box. The fianges 1G have openings 17 for the reception of securing screws. The central portion 14 is provided with an opening 1S, here shown as rectangular, and on the inner side of the central portionl at points between the corners lof the said opening are recesses 19. The bushing has a head 21 cf a -size and shape adapting it to 5 pass through the opening 19, the bushing being interiorly threaded for engagement with the usual pipe of the fixture and being also eXteriorly threaded and provided with a locking nut 22. After the base has been ixed at the required point in the conduit or against a wall or other like place and the bushing has been secured to the pipe of the fixture, it is only necessary to pass the head of the bushing through the opening 18 and then partly turn the same to engage the corners of the head with the locking recesses 19. and then screw up the lock nut so as to cause the latter to coact with the head in detachably and yet firmly securing the bushing to the base.

`While I have'herein shown and described l'my invention as embodied in two forms of separable electric fixture joints I would have it vunderstood that other, changes may be made in the form, proportion and construction of the several parts without departing from the spirit of my invention and within the scopegio the appended claim.

I claim The herein described separable electric Xt-l'e-J'Ont Comprising a base havingl main member tapped for engagementI with an outlet pipe or conduit stud, the said main member being hollow and having an outer wall" provided with an opening, saidmain member` also having a groove at the inner side of said wall and around said opening;

'an insulating member arranged in said groove and in the inner side of said outer i wall and provided with an opening; a, bushing internally and exteriorly threaded and provided with a head lat one end to pass through. said opening in the insulator and provided with-means to directly engage the inner side of the insulator when the bushing is partly turned, said bushing extending out throughthe openings in the insulator and the louter wall of the mainmember and a locking 'nut bearing on jthe bushing and against the outer side of the insulating member, the internal threads of said bushing adapting the same for engagement by an electric fixturel pipe. A l

v In testimony whereof I aix-xny signature in presence of two witnesses.

HARTHUR D. inzien. y 

